Sewer-pipe-bend machine.



R. L. RIGKMAN.

SEWER PIPE BEND MACHINE.

APPLICATION 11.21) JUNE 9, 1910.

Patented July 16, 1912.

2 SHEETBS HEET 1.

INVEN T0 WITNESSES 90mm Wm" 00.. WASHINGTON. n c.

R. L. RIOKMAN.

SEWER PIPE BEND MACHINE.

rum-r101: Hum JUNBQ, 1910.

Patented July 16, 1912.

2 SHEBTSSHEET 2.

INVENTUH I III WITNESSES Mira ATENT Fries.

SEWER-PIPE-BEND MACHINE.

To all whom it may concern:

Be it known that I, ROBERT L. RIOKMAN, a citizen of the United States, residing at Vancouver, in the county of Vancouver and Province of British Columbia, Dominion of Canada, have invented certain new and useful Improvements in Sewer-Pipe-Bend Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for the manufacture of sewer pipe, and with respect to its more specific features, to machines for the manufacture of sewer pipe bends or elbows having bell ends.

One of the objects of the invention is to provide an efficient machine which will make sewer pipe bends of cement, concrete or similar material.

Another object is the production of a practical device to make these bends with a flanged hell or hub whereby the pipes may be readily connected one to another.

Another object is to provide a machine to make bends of a uniform size and from which the bend may be easily removed and with which the work may be performed accurately and expeditiously.

Other objects are in part obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, wherein is shown one of many possible embodiments of my invention, Figure 1 represents a side elevation of a sewer pipe bend machine, some parts being insection for the sake of clearness; Fig. 2 represents a rear end elevation of the machine; Fig. 3 is a view of the bell core; and Fig. 4 is a plan view of the bell core.

Similar reference characters refer to similar parts throughout the several views of the drawings.

The machine embodies a support comprising a base portion 1 to which are fastened upright posts 2. To the upper portion of the support are secured brackets 3 extending over the base. Pivoted to the support is a table or hopper 4 adapted to be swung Specification of Letters Patent.

Application filed June 9, 1910.

Serial No. 566,075.

on its pivot and thereby raised and lowered, and in its lower position resting upon the brackets 3. Said table is provided with an opening 5 adapted to closely surround the bell end of the mold, as will appear l1erein after. The support or main frame sustains an inclined platform 6 at a point below the table, said platform having a central opening and being provided with an annular shoulder 7 surrounded by and spaced from the central opening. A pivot pin 8 is secured at the upper rear portion of the support, and pivotally mounted on this pin at its central portion is a lever comprising an arm 9 provided with an upwardly extending operating handle 10. The arm and the handle are preferably made in sections, bolted together at 11, as shown. Removably secured to the arm 9 is a core 12 which, in its configuration, is a section of an annular cylinder. This core is preferably closed at one end and is smaller than the mold in cross section.

Supported on the pivot pin 8 is a tamper carrying frame consisting of arms 13, one on each side of the pivotal point of the arm 9, each arm being provided with a curved downward extension 1 1, the latter being con nected by a tamper or tamping device 15, consisting of a ring or annulus bridging the space between the extensions 14, and having a greater internal diameter than the core and a less external diameter than the mold. The wall of the tamper 15 is curved concentrically with the axis 8, so as to conform with the curvature of the mold.

The arms 13 are provided with extensions 16 pivotally connected through the links 17 to an operating foot lever 18 fulcrumed at 19 on the base 1. Coiled springs 20, attached at one end to the foot lever 18 and at the other end to the posts 2, retain the foot lever in elevated position.

In order to removably retain the core 12 in position in the mold, a latching device is provided. Any suitable construction of latching device may be used, but in the pres ent instance a spring latching device is employed. The arm 9 is provided with a pivotally supported latch lever 21 kept in normal latching position by a spring 22, said latch lever engaging a lug or keeper 23 on the platform 6. The lever 21 has an operating extension 24 which extends over the end of the arm 9, and is adapted to be pressed by the foot of the operator to free the latch.

Patented July 16, 1912.

By this operation, not only is the latch lever 21 disengaged from the lug or keeper, but the foot of the operator contacts with the arm 9, which may be pressed'downwardly, for a purpose hereinafter apparent.

The mold 25 is made in sections, preferably two, hinged together by arms 26 extending therefrom, andretained in closed position by the latch 27. The mold is provided with a handle 28. The mold, when closed, presents a hollow curved-cylindrical structure having an elongated body portion and a bell portion or end 29, of larger size than the body portion. The interior surface of the mold corresponds to the exterior shape of the pipe to be formed, and the smaller end of this mold rests upon the platform 6 within the annular shoulder 7, its upper and enlarged end being positioned within the opening 5 in the table or hopper 4:. This construction permits the mold to be readily removed from or replaced upon the platform 6.

Removably mounted on the end of the main core 12 is the bell core 30, constituting an enlargement of the main core. The bell core is annular in cross section and closed at one end, its exterior surface being tapered to define the diameter and shape of the bell end of the pipe. It is provided with a handle 31. The bell core is placed over and embraces the end of the main core.

The operation in the manufacture of pipe is as follows: The table 4: is brought down upon the brackets 3 with its opening registering with the bell end of the mold 25, which latter is supported upon the platform 6, as aforesaid. The handle 10 is thrown rearwardly, thus elevating the arm 9 and carrying the core 12 into the mold. IVhen the core has entered the mold to its fullest extent, it will be locked in position by the latching device 21 and 23. Both the mold and the core are preferably cylindrical in cross section, and as the core rests in the mold it is spaced therefrom by a distance equal to the thickness of the pipe to be formed. Cement, concrete or whatever material is to be formed into pipe having been placed upon the hopper 4, some of it is pushed into the spacebetween the mold and the core and is tamped and pressed down by operating the foot lever 18, which operation lowers the tamping device 15 into the mold, the same passing over the core 12 and into the mold. Sufficient material having been rammed or tamped into the mold to form the body portion of the pipe, the tamping device is removed by releasing the foot lever and the bell core 30 placed over the upper end of the main core 12. Additional material is then inserted between the bell core and the mold, and tamped in by hand, thus completing the pipe. The bell core is of a larger external diameter than the main core, and when placed in position upon the main core defines a space between its external surface and the internal surface of the bell end of the mold, such that the pipe is provided with an interior shoulder at the bell end, the thickness of the pipe being substantially the same from one end to the other. It is obvious, however, that by employing bell cores of differentsize, the thickness of the pipe at this end may be varied as desired. The bell core is provided with a handle for its easy manipulation.

The above described embodiment of the invention represents a practical machine capable of producing sewer pipe bends of cement, concrete or similar material, of a uniform size and with great rapidity, besides providing for the ready removal of the finished pipe. The center of curvature of the mold and of the paths of the. core and the tamper are substantially identical, whereby simple constructive elements may be utilized and complicated mechanism dispensed with.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a. machine of the character described, in combination, a frame adapted to support a mold, and a core and a tamper movably mounted on said frame and adapted to move in curved paths.

2. In a machine of the character described, in combination, a support, a curved mold for a pipe bend, a core pivoted to the support and adapted to assume position in the mold, and tamping means pivoted to the support.

3. In a machine of the character described, in combination, a support, a curved mold for a pipe bend, a core pivoted to the support adapted to assume position in the v mold and spaced therefrom, and tamping means movably mounted on the support and adapted to enter the space between the mold and the core.

1. In a machine of the character described, in combination, a support, a mold for a pipe bend thereon, a table movably mounted thereon having an opening registering with an opening in the mold, and a pivotally mounted core in the mold.

5. In a machine of the character described, in combination, a support, a mold for a pipe bend thereon, a table movably mounted thereon having an opening registering with an opening in the mold, a core, and a tamper pivotally mounted on the support and adapted to enter and leave the mold. A

6. In a machine of the character described, in combination, a support, a mold for a pipe bend thereon, a table movably mounted thereon having an opening registering with an opening in the mold, a pivotally mounted core in the mold, and a tamper pivotally mounted on the support adapted to enter and leave the mold.

7. In a machine of the character described, in combination, a support, a curved annular mold thereon, and annular tamping means adapted to describe a curved path 00- operating therewith.

8. In a machine of the character described, in combination, a support, a hollow mold thereon open at each end, a core pivotally supported to enter the mold at one end, and tamping means pivotally supported to enter the mold at the other end.

9. In a machine of the character described, in combination, a support, a mold thereon, an arm pivoted on the support, a core carried thereby and adapted to enter and be secured in position with respect to the mold, a second arm pivotally mounted on the support, and tamping means carried by the second arm and adapted to move in and out of the mold.

10. In a machine of the character described, in combination, a support, a moldthereon, a table pivoted to the support and having an opening registering with an opening in the mold, an arm pivoted on the support, a core carried thereby and adapted to enter and be secured in position with respect to the mold, a second arm pivotally mounted on the support, and tamping means carried by the second arm and adapted to move in and out of the mold.

11. In a machine of the character described, in combination, a support, a mold carried thereby, a pivot pin carried thereby, a tamping device pivoted on the pin and adapted to enter the mold, and a core pivoted on the pin and adapted to enter the mold. I

12. In a machine of the character described, in combination, a support, a mold carried thereby, a pivot pin carried thereby, arms pivotally mounted on the pin and carrying a tamping device adapted to enter the mold, and an arm pivotally mounted on the pin between the arms of the tamping device, and carrying a core adapted to enter the mold.

13. In a machine of the character described, in combination, a support, a mold thereon, a tamping device pivotally mounted on the support, an operating lever, and links connecting the lever and the tamping device whereby the tamping device is adapted. to move on its pivot into and out of the mold.

14. In a machine of the character described, in combination, a support, a mold thereon, an arm pivotally mounted on the support and carrying a core rigid therewith adapted to enter the mold, and a latching device to secure the core in position.

15. In a machine of the character described, in combination, a support, a mold thereon, an arm pivotally mounted on the support, a core on the arm adapted to enter the mold, and a spring latching device to hold the arm with the core in the mold, comprising a manually operated lever.

16. In a machine of the character described, in combination, a support, a mold thereon, a lever provided with a core adapted to enter and leave the mold, and latching mechanism between the lever and the suport com risin a movable member the o 3- eration of which tends to remove the core from the mold.

17. In a machine of the character described, in combination, a support, a hollow curved mold thereon, and a coreand a tamper cooperating with the mold and supported to move in paths whose centers of curvatureare the same as that of the mold.

18. In a machine of the characterde scribed, in combination, a support, a mold statlonarlly supported thereon comprising a body portion and an enlarged hub portion,

a core within the mold providing between its wall and the walls of the mold a space for the production of a pipe having a uniform interior configuration and an exterior having an enlarged portion, and a tamping device movable with respect to the mold and adapted to enter the space between the core and mold.

19. In a machine of the character described, in combination, a support, a mold, a core pivotally mounted on an arm and having an enlarged removable end portion and adapted to define a pipe space in the mold, and pivotally mounted means to tamp the material in the mold.

20. In a machine of the character de scribed, in combination, a support, a curved mold adapted to be stationarily mounted thereon, a core mounted to move in a curve corresponding to that of the mold, and a tamper mounted to move in a similar curve adapted to enter said mold.

21. In a machine of the character described, in combination, a stationary support, a pivotally mounted supporting memher, a core carried thereby, a second supporting member pivoted concentrically with the first, a tamper. carried thereby, and means adapted to'support a mold in cooperative relationship with said core and tamper.

22. In a machine of the character described, in combination, a table having an opening, means adapted to support a mold in line with said opening, a pivotally mounted core adapted to enter the mold, and a pivotally mounted tamper cooperatively associated therewith.

23. In a machine of the character described, in combination, a stationary support, a pivotally mounted supporting member, a core carried thereby, a second supporting member pivoted concentrically with the first member, a tamper carried thereby, means adapted to hold a mold in cooperative relationship with said core and tamper, and manual means connected with the core and tamper whereby the same may be operated.

24. In a machine of the character described, in combination, a stationary support, a pivotally mounted supporting member, a core carried thereby, a second sup porting member pivoted concentrically with the first member, a tamper carried thereby, means adapted to hold a mold in cooperative relationship with said core and tamper, a handle for operating said core, a treadle for operating said tamper and yielding means to normally retain the tamper apart from the core.

25. In a machine of the character 'describeKiTi'nToifibin'at-ion, a stationary support, a table movably mounted thereon, a core and a tamper pivotally mounted there on and adapted to move in concentric paths across the table, and means for retaining a mold in said path of movement.

26. In a machine of the character described, in combination, a stationarily supported curved mold, a core adapted to enter the mold at one end and comprising a pivotally mounted arm having means to retain the core in position in the mold, a tamper adapted to enter the opposite end of the mold and comprising a pivotally mounted arm, operating mechanism for the tamper, and means to yieldingly maintain the tamper outside the mold.

27. In a molding machine for making ells, pipe-turns and the like, the combination of a curved form-and means for supporting the same, a bearing concentric with the curvature of said form, a curved core pivotally mounted upon said bearing and adapted to be moved into and out of said form, and a tamping member pivotally mounted upon said bearing and adapted to be moved into and out of said form at its opposite end for the purpose mentioned.

28. In a molding machine, a curved form removably mounted upon a suitable support, a core and a tamping member both pivotally mounted and moving upon a common axis concentric with the curvature of said form, whereby said core and tamping member can be moved upon said axis telescopically into and out of said form, for the purpose de scribed.

29. In an apparatus of the character described, in combination, a support, a curved annular mold thereon, and an annular tamper cooperating therewith having curved walls and adapted to describe a curved path.

80. In an apparatus of the character described, in combination, a support, a curved mold removably mounted thereon, an arm pivoted to the support, a curved core removably secured to said arm and adapted to assume position in the mold, and a tamper pivoted to the support.

In testimony whereof I mix my signature, in the presence of two witnesses.

ROBERT LEE RIGKMAN.

Witnesses:

JOHN D. SIBBALD, ELIZABETH BURGET.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

